diff --git a/.github/workflows/demo.yml b/.github/workflows/demo.yml
index 617b01e..9f0f10f 100644
--- a/.github/workflows/demo.yml
+++ b/.github/workflows/demo.yml
@@ -1,7 +1,7 @@
 name: Demo
 
 on:
-  push:
+  pull_request:
 
 jobs:
   build:
diff --git a/demo.py b/demo.py
index 9261a52..0493645 100644
--- a/demo.py
+++ b/demo.py
@@ -1 +1 @@
-"foo" + 1
+"foo" + 2